Porter's Five Forces Applied to Your Small Business (With Example)

Table of Contents

• The 5 forces, explained without jargon

  • 1. Rivalry among existing competitors
  • 2. Threat of new entrants
  • 3. Bargaining power of suppliers
  • 4. Bargaining power of buyers
  • 5. Threat of substitute products or services
• How to apply it step by step to your business
• Full example: a freelance design studio for restaurants
• What to do with each force when it comes out "high"
• The Five Forces don't replace SWOT

When someone says "I analyzed the competition," it almost always means they looked at two or three similar businesses' prices. Porter's Five Forces force you to look further: not just who sells the same thing you do today, but who might start selling it tomorrow, who can take away your bargaining power from the supplier side, who from the buyer side, and what else — not even similar — could solve your customer's problem without going through you.

Michael Porter published the model in 1979 with big industries in mind, which is why it sounds like expensive consulting. But the five questions it asks are just as useful — and more urgent — for a small business or a freelancer, because there the room to absorb a hit from any of the five forces is much smaller.

The 5 forces, explained without jargon

1. Rivalry among existing competitors

This is the obvious force: how many businesses sell the same thing as you, to whom, and how aggressively they compete on price. But the question that matters isn't "how many are there," it's do they compete on price or on something else? A sector with ten competitors fighting on service, location or specialization is less brutal than one with three competitors who only cut prices to win the customer.

Sign of high rivalry: when everyone's margin in the sector keeps shrinking year after year and nobody manages to differentiate on anything but price.

2. Threat of new entrants

It's not just "can someone enter?" It's how easy is it for someone to enter? If setting up your type of business takes little capital, requires no special license, and there's no strong brand loyalty, the threat is high: someone can show up any time and copy what you do.

The real barriers in a small business are almost never capital. They're: a trust-based relationship built over years, a license or certification that's hard to get, an exclusivity deal with a supplier, or already being positioned in the channel where your customers look (the top result on Google Maps, the account with the most followers in the niche).

3. Bargaining power of suppliers

What happens if your main supplier decides to raise prices 20% tomorrow? If you have only one and switching is expensive or slow, the supplier holds all the power. If there are five similar suppliers and switching is easy, you hold it.

This also applies to suppliers that aren't about goods: a payment platform, software your operation depends on, or a single key person on your team whose knowledge nobody else has (that's also a "supplier" in Porter's sense: something you depend on that can get more expensive or fail).

4. Bargaining power of buyers

This is the mirror force: how easy is it for your customer to go elsewhere, and how much does it hurt you if they do? If a single client is 40% of your revenue, that client has enormous bargaining power over you, even if they never openly use it: they know that if they leave, it hurts you more than it hurts them.

Client concentration is, in practice, the force that breaks small businesses the most. Not from bad management, but because nobody calculated how exposed they were.

5. Threat of substitute products or services

This is the most ignored one, because it doesn't look like "competition" in the traditional sense. A substitute doesn't sell the same thing you do: it solves the customer's same problem a different way. Public transit is a substitute for a taxi. A YouTube recipe is a substitute for a paid cooking class. An AI chatbot is a substitute for part of what a freelance writer or support agent does.

The question that exposes this: if your customer didn't hire you or your direct competitors, what would they do instead? That answer is the substitute, and it usually comes from an industry you weren't even watching.

How to apply it step by step to your business

You don't need a forty-page report. For each of the five forces, answer in one or two sentences:

1. Rivalry: how many compete directly with me, and on what: price, service, speed, specialization?
2. New entrants: how easy would it be for someone to copy my business in six months? What do I have that a newcomer would struggle to get?
3. Suppliers: what or who do I depend on that would really hurt if it got more expensive or failed? Do I have a fast alternative?
4. Buyers: what share of my revenue depends on my biggest client? How easy is it for them to leave?
5. Substitutes: if my client didn't hire me, what would they do instead? Is that alternative improving fast (like generative AI in several services)?

Rate each force as high, medium or low pressure on your business. The ones that come out "high" are the ones that need a concrete action, not all five equally.

Full example: a freelance design studio for restaurants

A designer who does visual identity and social content for local restaurants.

Force	Assessment	Level
Rivalry	Several freelance designers in the city, but few specialize in restaurants specifically; most compete on a generic portfolio	Medium
New entrants	Anyone with Canva and a social media course can offer something similar within a month; no real entry barrier	High
Suppliers	Depends on Canva Pro and a stock image library; both have easy alternatives if prices rise	Low
Buyers	Two restaurants account for 55% of monthly revenue	High
Substitutes	AI tools already generate basic posts and graphics without a designer; a restaurant owner can do it themselves with an app	High

Reading the example. The three high forces tell a clear story: it's easy for a newcomer to enter, it's easy for the client to switch to an AI tool instead of another designer, and revenue depends too heavily on two clients. The "medium" rivalry and "low" supplier power barely matter next to that.

The action this analysis points to isn't "design better." It's specializing even further (measurable restaurant case studies, not a generic portfolio, to raise the entry barrier), diversifying the client base so no single one is more than 20-25%, and shifting part of the offer toward something AI doesn't do well yet: brand strategy and ongoing guidance, not just the standalone graphic piece.

What to do with each force when it comes out "high"

• High rivalry: differentiate on something other than price — service, specialization, delivery speed. Competing only on price under high rivalry is a race to zero margin.
• High threat of new entrants: build what would take a newcomer time to replicate: documented success stories, a community, a years-long relationship. Nobody can copy that in a weekend.
• Suppliers with high power: find a second option, even a pricier one, just so you don't depend on a single source. The cost of the alternative is insurance, not an expense.
• Buyers with high power: no client should be more than you can afford to lose without going under. If a client already crosses that line, the priority is landing the next one before you lose that one.
• Rising substitutes: don't compete against the substitute on its own turf (price, speed). Compete on what the substitute doesn't do: judgment, context, accountability for the outcome.

The Five Forces don't replace SWOT

Porter's Five Forces are a magnifying glass over one single type of external risk: how tough competition is in your sector. They don't look at your internal strengths or weaknesses, or at opportunities unrelated to competition. For that you still need a full SWOT analysis, which does cross the internal with the external. Use both together: SWOT gives you the full picture, the Five Forces dig deeper into the competitive threat that SWOT only notes in a single line. If that points to rethinking the whole business, the Business Model Canvas is the next map to fill in.